What is fzshellext.dll?

fzshellext.dll is part of fzshellext Dynamic Link Library according to the fzshellext.dll version information.

fzshellext.dll's description is "fzshellext Dynamic Link Library"

fzshellext.dll is digitally signed by Tim Kosse.

fzshellext.dll is usually located in the 'C:\Program Files\FileZilla FTP Client\' folder.

Some of the anti-virus scanners at VirusTotal detected fzshellext.dll.

If you have additional information about the file, please share it with the FreeFixer users by posting a comment at the bottom of this page.

VirusTotal report

1 of the 72 anti-virus programs at VirusTotal detected the fzshellext.dll file. That's a 1% detection rate.

Scanner	Detection Name
Microsoft	PUA:Win32/FusionCore

Sandbox Report

The following information was gathered by executing the file inside Cuckoo Sandbox.

Summary

Successfully executed process in sandbox.

Summary

{
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\6c2e62da6cf02fcbb56c405db306bd34fd941648b592fcbfa0ea98854cd9096c.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\6c2e62da6cf02fcbb56c405db306bd34fd941648b592fcbfa0ea98854cd9096c.bin.dll.manifest"
    ],
    "regkey_opened": [
        "HKEY_LOCAL_MACHINE\\Software\\FileZilla 3\\fzshellext",
        "HKEY_CURRENT_USER\\Software\\FileZilla 3\\fzshellext"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
    ],
    "dll_loaded": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\6c2e62da6cf02fcbb56c405db306bd34fd941648b592fcbfa0ea98854cd9096c.bin.dll"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2740,
        "summary": {
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\6c2e62da6cf02fcbb56c405db306bd34fd941648b592fcbfa0ea98854cd9096c.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\6c2e62da6cf02fcbb56c405db306bd34fd941648b592fcbfa0ea98854cd9096c.bin.dll.manifest"
            ],
            "regkey_opened": [
                "HKEY_LOCAL_MACHINE\\Software\\FileZilla 3\\fzshellext",
                "HKEY_CURRENT_USER\\Software\\FileZilla 3\\fzshellext"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ],
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\6c2e62da6cf02fcbb56c405db306bd34fd941648b592fcbfa0ea98854cd9096c.bin.dll"
            ]
        },
        "first_seen": 1580395985.65625,
        "ppid": 1664
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1580395985.34375,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "Allocates read-write-execute memory (usually to unpack itself)",
        "severity": 2,
        "marks": [
            {
                "call": {
                    "category": "process",
                    "status": 1,
                    "stacktrace": [],
                    "api": "NtProtectVirtualMemory",
                    "return_value": 0,
                    "arguments": {
                        "process_identifier": 2740,
                        "stack_dep_bypass": 0,
                        "stack_pivoted": 0,
                        "heap_dep_bypass": 0,
                        "length": 4096,
                        "protection": 64,
                        "process_handle": "0xffffffff",
                        "base_address": "0x74f8c000"
                    },
                    "time": 1580395985.78125,
                    "tid": 2436,
                    "flags": {
                        "protection": "PAGE_EXECUTE_READWRITE"
                    }
                },
                "pid": 2740,
                "type": "call",
                "cid": 10
            }
        ],
        "references": [],
        "name": "allocates_rwx"
    },
    {
        "markcount": 2,
        "families": [],
        "description": "The binary likely contains encrypted or compressed data indicative of a packer",
        "severity": 2,
        "marks": [
            {
                "entropy": 7.116356694290047,
                "section": {
                    "size_of_data": "0x00004400",
                    "virtual_address": "0x00005000",
                    "entropy": 7.116356694290047,
                    "name": ".rdata",
                    "virtual_size": "0x0000427c"
                },
                "type": "generic",
                "description": "A section with a high entropy has been found"
            },
            {
                "entropy": 0.5230769230769231,
                "type": "generic",
                "description": "Overall entropy of this PE file is high"
            }
        ],
        "references": [
            "http:\/\/www.forensickb.com\/2013\/03\/file-entropy-explained.html",
            "http:\/\/virii.es\/U\/Using%20Entropy%20Analysis%20to%20Find%20Encrypted%20and%20Packed%20Malware.pdf"
        ],
        "name": "packer_entropy"
    }
]

Yara

The Yara rules did not detect anything in the file.

Network

{
    "tls": [],
    "udp": [
        {
            "src": "192.168.56.101",
            "dst": "192.168.56.255",
            "offset": 546,
            "time": 3.077362060546875,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4318,
            "time": 3.0318610668182373,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4646,
            "time": 1.03666090965271,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4974,
            "time": 3.041295051574707,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5302,
            "time": 1.5333099365234375,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5630,
            "time": -0.09248590469360352,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 5958,
            "time": 1.5619580745697021,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 14640,
            "time": 1.0698559284210205,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 18832,
            "time": 3.1247029304504395,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "e99a60658631a47f173c05ffeeff62618c6f6ac39c1bc50c30f1fe50f657ebbd",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "35e96a294da5275789801152b0243aa64c06ecb2ad1cd909422214b2f5bf8965",
    "irc": [],
    "https_ex": []
}

Screenshots

Other files also named fzshellext.dll

fzshellext.dll (6 votes)

Malware or legitimate?

If you feel that you need more information to determine if your should keep this file or remove it, please read this guide.

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